Requirements
What is an MCS-90 endorsement and who needs one?
If you are getting new trucking authority, your insurer will attach an MCS-90 to your liability policy. Here is what the endorsement promises, who needs one, what it leaves out and how it can cost you after an accident.
What an MCS-90 does
The MCS-90 is a standard FMCSA form. In it, the insurer agrees to pay any final judgment against you for public liability caused by negligence in the operation, maintenance or use of your trucks — whether or not each truck is listed on the policy and wherever the accident happens. Public liability means bodily injury, property damage and environmental restoration, such as cleaning up a spill of the commodity you were hauling.
The key line says no condition, exclusion or policy violation relieves the insurer of paying that judgment, even if you are insolvent or bankrupt. An insurance attorney at Matthiesen, Wickert & Lehrer describes this as making the insurer a surety to the public. The limit on the form applies separately to each accident.
Who needs an MCS-90
Under 49 CFR 387.3, the federal rule applies to for-hire motor carriers hauling property in interstate or foreign commerce, and to any carrier — for-hire or private — hauling hazardous materials, substances or wastes, including some intrastate hazmat. Vehicles with a gross vehicle weight rating under 10,001 pounds are exempt unless they carry certain explosives, highly toxic materials or highway route controlled quantities of radioactive material. Intrastate hauling of non-bulk hazmat is also exempt, with a radioactive-material exception.
Under 49 CFR 387.7, you must keep proof of the required limits at your principal place of business. Most carriers use an MCS-90; the alternatives are an MCS-82 surety bond or FMCSA approval to self-insure. Carriers that stay within one state and haul general freight follow state rules instead, often through a state filing such as a Form E.
| Operation | What you haul | Minimum per accident |
|---|---|---|
| For-hire, interstate, 10,001 lbs or more | General freight (nonhazardous) | $750,000 |
| For-hire or private, 10,001 lbs or more | Oil and hazmat not listed below (interstate any quantity, intrastate bulk only) | $1,000,000 |
| For-hire or private, 10,001 lbs or more | Certain bulk hazmat, such as hazardous substances in cargo tanks, bulk explosives or bulk gases | $5,000,000 |
| For-hire or private, interstate, under 10,001 lbs | Certain explosives, toxic inhalation hazards or radioactive shipments | $5,000,000 |
What an MCS-90 does not cover
The endorsement protects the public, not your business. The form and legal analyses of it draw these lines:
- Injury or death of your own employees while they are working.
- Property you are hauling as cargo. That needs motor truck cargo coverage.
- Damage to your own truck or trailer, which falls under physical damage coverage.
- Amounts above the limit stated on the form. The insurer is not liable beyond that figure for each accident.
- Your legal defense. The Matthiesen, Wickert & Lehrer analysis notes the endorsement creates no duty to defend you, though insurers often defend anyway.
The reimbursement clause: why it matters to you
The MCS-90 changes what the insurer owes the public, not what it owes you. The form says all policy terms stay binding between you and the insurer, and that you agree to reimburse the insurer for any payment it would not have made except for the endorsement.
Risk Placement Services, a wholesale insurance broker, gives a common example: a carrier starts the year with 15 trucks, adds a 16th without telling its insurer and then has a crash in that truck. The policy may exclude the unlisted truck, but the MCS-90 can still force the insurer to pay — and the insurer can then come after the carrier for the money. The Matthiesen, Wickert & Lehrer article notes that such claims often end in the carrier’s bankruptcy or closure.
MCS-90 versus the BMC-91X filing
The two are often confused. Progressive Commercial explains that the MCS-90 is not filed with FMCSA; instead, the insurer submits a BMC-91X filing to FMCSA as certification that the endorsement has been issued. Risk Placement Services notes that once insurance is bound, the insurer completes the federal filing on your behalf.
Under 49 CFR 387.15, the endorsement must be issued in the exact name of the motor carrier, so check it against your registered legal name. Under 49 CFR 387.7, your proof of coverage is public information you must produce on reasonable request.
| Document | What it is | Where it lives |
|---|---|---|
| MCS-90 | Endorsement on your liability policy | With your policy, kept at your principal place of business |
| BMC-91 or BMC-91X | Insurer’s electronic proof of liability coverage | FMCSA’s insurance records |
| MCS-82 | Surety bond alternative to insurance | Issued by a surety company |
Cancelling, renewing and switching insurers
Coverage under an MCS-90 runs continuously until cancelled. The form requires 35 days’ written notice between you and the insurer and, for carriers registered with FMCSA, 30 days’ notice to FMCSA. Risk Placement Services warns that policies with federal filings cannot be flat-cancelled, so you may owe about 35 extra days of premium.
When you switch insurers, 49 CFR 387.7 ends the old insurer’s liability on the new policy’s effective date or at the end of the 35-day notice period, whichever comes first. The Carrier Standard, citing FMCSA guidance, says a new MCS-90 is not needed at renewal if the policy number stays the same. If you lease onto another carrier and run under its authority, that carrier is responsible for the federal coverage.
How to stay compliant and avoid a reimbursement bill
Most MCS-90 problems come from paperwork, not crashes. These steps help:
- Report every new truck and driver to your insurer before they run a load.
- Check that the limit matches what you haul. Moving into hazmat can raise your minimum from $750,000 to $1,000,000 or $5,000,000.
- Make sure the endorsement shows your exact legal name, and keep a copy with your policy at your principal place of business.
- Have the replacement policy and its filing in place before you cancel the old one.
- Check FMCSA’s records after any change to confirm your insurance filing shows as active.
Frequently asked questions
Does an MCS-90 cost extra?
It is not sold as a separate product. The form says the insurer issues it in consideration of the premium on your liability policy, so the real cost is the qualifying liability coverage itself. A broker such as Florin can compare liability quotes from several insurers.
Is the MCS-90 the same as BIPD insurance?
No. BIPD is your bodily injury and property damage liability coverage. The MCS-90 is the federal endorsement attached to that coverage, which guarantees payment to the public up to the required limit.
Do private carriers need an MCS-90?
Only if they haul hazardous materials covered by 49 CFR 387.3. Private carriers hauling their own nonhazardous goods are outside this federal rule, although state requirements may still apply.
Does the MCS-90 protect me if I am sued?
Not directly. It guarantees the injured person is paid, but you can owe the insurer whatever it paid only because of the endorsement. Your own protection comes from the underlying policy.
Figures are third-party estimates and examples, not quotes. Coverage depends on the policy terms and underwriting, and rules vary by state.